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<a name="1" href="#1">1</a>   <strong class="jxr_keyword">package</strong> com.googlecode.transloader.clone.reflect;
<a name="2" href="#2">2</a>   
<a name="3" href="#3">3</a>   <strong class="jxr_keyword">import</strong> java.lang.reflect.Field;
<a name="4" href="#4">4</a>   <strong class="jxr_keyword">import</strong> java.lang.reflect.Modifier;
<a name="5" href="#5">5</a>   <strong class="jxr_keyword">import</strong> java.util.ArrayList;
<a name="6" href="#6">6</a>   <strong class="jxr_keyword">import</strong> java.util.Arrays;
<a name="7" href="#7">7</a>   <strong class="jxr_keyword">import</strong> java.util.List;
<a name="8" href="#8">8</a>   
<a name="9" href="#9">9</a>   <strong class="jxr_keyword">import</strong> com.googlecode.transloader.Assert;
<a name="10" href="#10">10</a>  <strong class="jxr_keyword">import</strong> com.googlecode.transloader.ClassWrapper;
<a name="11" href="#11">11</a>  
<a name="12" href="#12">12</a>  <em class="jxr_javadoccomment">/**</em>
<a name="13" href="#13">13</a>  <em class="jxr_javadoccomment"> * A reflective wrapper around any object, exposing its fields.</em>
<a name="14" href="#14">14</a>  <em class="jxr_javadoccomment"> * </em>
<a name="15" href="#15">15</a>  <em class="jxr_javadoccomment"> * @author Jeremy Wales</em>
<a name="16" href="#16">16</a>  <em class="jxr_javadoccomment"> */</em>
<a name="17" href="#17">17</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../com/googlecode/transloader/clone/reflect/FieldReflector.html">FieldReflector</a> {
<a name="18" href="#18">18</a>  	<em class="jxr_javadoccomment">/**</em>
<a name="19" href="#19">19</a>  <em class="jxr_javadoccomment">	 * The list of primitive wrapper &lt;code&gt;Class&lt;/code&gt;es.</em>
<a name="20" href="#20">20</a>  <em class="jxr_javadoccomment">	 */</em>
<a name="21" href="#21">21</a>  	<strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> List PRIMITIVE_WRAPPERS =
<a name="22" href="#22">22</a>  			Arrays.asList(<strong class="jxr_keyword">new</strong> Class[] {Boolean.<strong class="jxr_keyword">class</strong>, Byte.<strong class="jxr_keyword">class</strong>, Character.<strong class="jxr_keyword">class</strong>, Short.<strong class="jxr_keyword">class</strong>, Integer.<strong class="jxr_keyword">class</strong>,
<a name="23" href="#23">23</a>  					Long.<strong class="jxr_keyword">class</strong>, Float.<strong class="jxr_keyword">class</strong>, Double.<strong class="jxr_keyword">class</strong>});
<a name="24" href="#24">24</a>  
<a name="25" href="#25">25</a>  	<strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> Object wrappedObject;
<a name="26" href="#26">26</a>  	<strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> ClassLoader classLoader;
<a name="27" href="#27">27</a>  
<a name="28" href="#28">28</a>  	<em class="jxr_javadoccomment">/**</em>
<a name="29" href="#29">29</a>  <em class="jxr_javadoccomment">	 * Wraps the given object in a new &lt;code&gt;FieldReflector&lt;/code&gt;. Retrieves the &lt;code&gt;ClassLoader&lt;/code&gt; of the</em>
<a name="30" href="#30">30</a>  <em class="jxr_javadoccomment">	 * wrapped object's &lt;code&gt;Class&lt;/code&gt; as the one to use for all class loading.</em>
<a name="31" href="#31">31</a>  <em class="jxr_javadoccomment">	 * </em>
<a name="32" href="#32">32</a>  <em class="jxr_javadoccomment">	 * @param objectToWrap the object whose fields you want to expose.</em>
<a name="33" href="#33">33</a>  <em class="jxr_javadoccomment">	 */</em>
<a name="34" href="#34">34</a>  	<strong class="jxr_keyword">public</strong> <a href="../../../../../com/googlecode/transloader/clone/reflect/FieldReflector.html">FieldReflector</a>(Object objectToWrap) {
<a name="35" href="#35">35</a>  		<strong class="jxr_keyword">this</strong>(objectToWrap, getClassLoader(objectToWrap));
<a name="36" href="#36">36</a>  	}
<a name="37" href="#37">37</a>  
<a name="38" href="#38">38</a>  	<em class="jxr_javadoccomment">/**</em>
<a name="39" href="#39">39</a>  <em class="jxr_javadoccomment">	 * Wraps the given object in a new &lt;code&gt;FieldReflector&lt;/code&gt;.</em>
<a name="40" href="#40">40</a>  <em class="jxr_javadoccomment">	 * </em>
<a name="41" href="#41">41</a>  <em class="jxr_javadoccomment">	 * @param objectToWrap the object whose fields you want to expose.</em>
<a name="42" href="#42">42</a>  <em class="jxr_javadoccomment">	 * @param classLoaderToUse the &lt;code&gt;ClassLoader&lt;/code&gt; to use for loading &lt;code&gt;Class&lt;/code&gt;es from</em>
<a name="43" href="#43">43</a>  <em class="jxr_javadoccomment">	 *            {@link FieldDescription#getDeclaringClassName()}</em>
<a name="44" href="#44">44</a>  <em class="jxr_javadoccomment">	 */</em>
<a name="45" href="#45">45</a>  	<strong class="jxr_keyword">public</strong> <a href="../../../../../com/googlecode/transloader/clone/reflect/FieldReflector.html">FieldReflector</a>(Object objectToWrap, ClassLoader classLoaderToUse) {
<a name="46" href="#46">46</a>  		Assert.areNotNull(objectToWrap, classLoaderToUse);
<a name="47" href="#47">47</a>  		wrappedObject = objectToWrap;
<a name="48" href="#48">48</a>  		classLoader = classLoaderToUse;
<a name="49" href="#49">49</a>  	}
<a name="50" href="#50">50</a>  
<a name="51" href="#51">51</a>  	<em class="jxr_javadoccomment">/**</em>
<a name="52" href="#52">52</a>  <em class="jxr_javadoccomment">	 * Gets all the instance fields in the entire class hierarchy extended by the wrapped object.</em>
<a name="53" href="#53">53</a>  <em class="jxr_javadoccomment">	 * </em>
<a name="54" href="#54">54</a>  <em class="jxr_javadoccomment">	 * @return a description of each instance field in the class hierarchy extended by the wrapped object (&lt;code&gt;final&lt;/code&gt;</em>
<a name="55" href="#55">55</a>  <em class="jxr_javadoccomment">	 *         fields are not excluded, even though {@link #setValue(FieldDescription, Object)} can be attempted with</em>
<a name="56" href="#56">56</a>  <em class="jxr_javadoccomment">	 *         such descriptions)</em>
<a name="57" href="#57">57</a>  <em class="jxr_javadoccomment">	 */</em>
<a name="58" href="#58">58</a>  	<strong class="jxr_keyword">public</strong> <a href="../../../../../com/googlecode/transloader/clone/reflect/FieldDescription.html">FieldDescription</a>[] getAllInstanceFieldDescriptions() {
<a name="59" href="#59">59</a>  		<strong class="jxr_keyword">return</strong> getAllInstanceFieldDescriptions(wrappedObject.getClass());
<a name="60" href="#60">60</a>  	}
<a name="61" href="#61">61</a>  
<a name="62" href="#62">62</a>  	<strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <a href="../../../../../com/googlecode/transloader/clone/reflect/FieldDescription.html">FieldDescription</a>[] getAllInstanceFieldDescriptions(Class currentClass) {
<a name="63" href="#63">63</a>  		List descriptions = <strong class="jxr_keyword">new</strong> ArrayList();
<a name="64" href="#64">64</a>  		<strong class="jxr_keyword">while</strong> (currentClass != <strong class="jxr_keyword">null</strong>) {
<a name="65" href="#65">65</a>  			descriptions.addAll(getInstanceFieldDescriptions(currentClass));
<a name="66" href="#66">66</a>  			currentClass = currentClass.getSuperclass();
<a name="67" href="#67">67</a>  		}
<a name="68" href="#68">68</a>  		<strong class="jxr_keyword">return</strong> (FieldDescription[]) descriptions.toArray(<strong class="jxr_keyword">new</strong> FieldDescription[descriptions.size()]);
<a name="69" href="#69">69</a>  	}
<a name="70" href="#70">70</a>  
<a name="71" href="#71">71</a>  	<strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> List getInstanceFieldDescriptions(Class currentClass) {
<a name="72" href="#72">72</a>  		Field[] fields = currentClass.getDeclaredFields();
<a name="73" href="#73">73</a>  		List descriptions = <strong class="jxr_keyword">new</strong> ArrayList(fields.length);
<a name="74" href="#74">74</a>  		<strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i &lt; fields.length; i++) {
<a name="75" href="#75">75</a>  			Field field = fields[i];
<a name="76" href="#76">76</a>  			<strong class="jxr_keyword">if</strong> (!Modifier.isStatic(field.getModifiers())) {
<a name="77" href="#77">77</a>  				descriptions.add(<strong class="jxr_keyword">new</strong> <a href="../../../../../com/googlecode/transloader/clone/reflect/FieldDescription.html">FieldDescription</a>(currentClass, field.getName(), field.getType()));
<a name="78" href="#78">78</a>  			}
<a name="79" href="#79">79</a>  		}
<a name="80" href="#80">80</a>  		<strong class="jxr_keyword">return</strong> descriptions;
<a name="81" href="#81">81</a>  	}
<a name="82" href="#82">82</a>  
<a name="83" href="#83">83</a>  	<em class="jxr_javadoccomment">/**</em>
<a name="84" href="#84">84</a>  <em class="jxr_javadoccomment">	 * Gets the value of the field matching the given description on the wrapped object.</em>
<a name="85" href="#85">85</a>  <em class="jxr_javadoccomment">	 * </em>
<a name="86" href="#86">86</a>  <em class="jxr_javadoccomment">	 * @param description the description of the field</em>
<a name="87" href="#87">87</a>  <em class="jxr_javadoccomment">	 * @return the value of the field from the wrapped object</em>
<a name="88" href="#88">88</a>  <em class="jxr_javadoccomment">	 * @throws ClassNotFoundException if the &lt;code&gt;Class&lt;/code&gt; named by</em>
<a name="89" href="#89">89</a>  <em class="jxr_javadoccomment">	 *             {@link FieldDescription#getDeclaringClassName()} cannot be found by the &lt;code&gt;ClassLoader&lt;/code&gt;</em>
<a name="90" href="#90">90</a>  <em class="jxr_javadoccomment">	 *             selected by {@link #FieldReflector(Object)} or injected through</em>
<a name="91" href="#91">91</a>  <em class="jxr_javadoccomment">	 *             {@link #FieldReflector(Object, ClassLoader)}</em>
<a name="92" href="#92">92</a>  <em class="jxr_javadoccomment">	 * @throws NoSuchFieldException if the field named by {@link FieldDescription#getFieldName()} does not exist on the</em>
<a name="93" href="#93">93</a>  <em class="jxr_javadoccomment">	 *             &lt;code&gt;Class&lt;/code&gt; named by {@link FieldDescription#getDeclaringClassName()} or the</em>
<a name="94" href="#94">94</a>  <em class="jxr_javadoccomment">	 *             &lt;code&gt;Class&lt;/code&gt; named by {@link FieldDescription#getDeclaringClassName()} is not in the wrapped</em>
<a name="95" href="#95">95</a>  <em class="jxr_javadoccomment">	 *             object's class hierarchy</em>
<a name="96" href="#96">96</a>  <em class="jxr_javadoccomment">	 * @throws IllegalAccessException if the installed Security Manager does not allow access to the field</em>
<a name="97" href="#97">97</a>  <em class="jxr_javadoccomment">	 */</em>
<a name="98" href="#98">98</a>  	<strong class="jxr_keyword">public</strong> Object getValue(<a href="../../../../../com/googlecode/transloader/clone/reflect/FieldDescription.html">FieldDescription</a> description) <strong class="jxr_keyword">throws</strong> ClassNotFoundException, NoSuchFieldException,
<a name="99" href="#99">99</a>  			IllegalAccessException {
<a name="100" href="#100">100</a> 		Assert.isNotNull(description);
<a name="101" href="#101">101</a> 		<strong class="jxr_keyword">return</strong> getFieldHavingMadeItAccessible(wrappedObject, description, classLoader).get(wrappedObject);
<a name="102" href="#102">102</a> 	}
<a name="103" href="#103">103</a> 
<a name="104" href="#104">104</a> 	<em class="jxr_javadoccomment">/**</em>
<a name="105" href="#105">105</a> <em class="jxr_javadoccomment">	 * Sets the value of the field matching the given description on the wrapped object.</em>
<a name="106" href="#106">106</a> <em class="jxr_javadoccomment">	 * </em>
<a name="107" href="#107">107</a> <em class="jxr_javadoccomment">	 * @param description the description of the field to set</em>
<a name="108" href="#108">108</a> <em class="jxr_javadoccomment">	 * @param fieldValue the value to set</em>
<a name="109" href="#109">109</a> <em class="jxr_javadoccomment">	 * @throws ClassNotFoundException if the &lt;code&gt;Class&lt;/code&gt; named by</em>
<a name="110" href="#110">110</a> <em class="jxr_javadoccomment">	 *             {@link FieldDescription#getDeclaringClassName()} cannot be found by the &lt;code&gt;ClassLoader&lt;/code&gt;</em>
<a name="111" href="#111">111</a> <em class="jxr_javadoccomment">	 *             selected by {@link #FieldReflector(Object)} or injected through</em>
<a name="112" href="#112">112</a> <em class="jxr_javadoccomment">	 *             {@link #FieldReflector(Object, ClassLoader)}</em>
<a name="113" href="#113">113</a> <em class="jxr_javadoccomment">	 * @throws NoSuchFieldException if the field named by {@link FieldDescription#getFieldName()} does not exist on the</em>
<a name="114" href="#114">114</a> <em class="jxr_javadoccomment">	 *             &lt;code&gt;Class&lt;/code&gt; named by {@link FieldDescription#getDeclaringClassName()} or the</em>
<a name="115" href="#115">115</a> <em class="jxr_javadoccomment">	 *             &lt;code&gt;Class&lt;/code&gt; named by {@link FieldDescription#getDeclaringClassName()} is not in the wrapped</em>
<a name="116" href="#116">116</a> <em class="jxr_javadoccomment">	 *             object's class hierarchy</em>
<a name="117" href="#117">117</a> <em class="jxr_javadoccomment">	 * @throws IllegalAccessException if the installed Security Manager does not allow access to the field</em>
<a name="118" href="#118">118</a> <em class="jxr_javadoccomment">	 */</em>
<a name="119" href="#119">119</a> 	<strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> setValue(<a href="../../../../../com/googlecode/transloader/clone/reflect/FieldDescription.html">FieldDescription</a> description, Object fieldValue) <strong class="jxr_keyword">throws</strong> ClassNotFoundException,
<a name="120" href="#120">120</a> 			NoSuchFieldException, IllegalAccessException {
<a name="121" href="#121">121</a> 		Assert.areNotNull(description, fieldValue);
<a name="122" href="#122">122</a> 		getFieldHavingMadeItAccessible(wrappedObject, description, classLoader).set(wrappedObject, fieldValue);
<a name="123" href="#123">123</a> 	}
<a name="124" href="#124">124</a> 
<a name="125" href="#125">125</a> 	<strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> Field getFieldHavingMadeItAccessible(Object object, <a href="../../../../../com/googlecode/transloader/clone/reflect/FieldDescription.html">FieldDescription</a> description,
<a name="126" href="#126">126</a> 			ClassLoader classLoader) <strong class="jxr_keyword">throws</strong> ClassNotFoundException, NoSuchFieldException {
<a name="127" href="#127">127</a> 		Class declaringClass = ClassWrapper.getClass(description.getDeclaringClassName(), classLoader);
<a name="128" href="#128">128</a> 		Field field = declaringClass.getDeclaredField(description.getFieldName());
<a name="129" href="#129">129</a> 		field.setAccessible(<strong class="jxr_keyword">true</strong>);
<a name="130" href="#130">130</a> 		<strong class="jxr_keyword">return</strong> field;
<a name="131" href="#131">131</a> 	}
<a name="132" href="#132">132</a> 
<a name="133" href="#133">133</a> 	<strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> ClassLoader getClassLoader(Object object) {
<a name="134" href="#134">134</a> 		Assert.isNotNull(object);
<a name="135" href="#135">135</a> 		ClassLoader classLoader = object.getClass().getClassLoader();
<a name="136" href="#136">136</a> 		<strong class="jxr_keyword">return</strong> classLoader == <strong class="jxr_keyword">null</strong> ? ClassLoader.getSystemClassLoader() : classLoader;
<a name="137" href="#137">137</a> 	}
<a name="138" href="#138">138</a> }
</pre>
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